[oe] openembedded with a prebuilt external toolchain

[Denys Dmytriyenko]

On Mon, Feb 14, 2011 at 03:14:40PM -0500, Joey Oravec wrote:
> On 2/10/2011 6:35 PM, Tom Rini wrote:
>>> Both the -csl.bb and -generic.bb copy a bunch of stuff to STAGING_DIR in
>>> do_stage(). Of course in the long-run I need for the recipe to copy C
>>> libraries, but for now I should be able to leave the body blank. At
>>> least it'll use my compiler and run to completion. Right?
>>
>> Well, as you saw, it fails in some cases.  This is because, yeah, we're 
>> telling the toolchain stuff lives ...here now, and it doesn't.
>
> Thanks for the additional help on chat! This followup is to share my 
> results with the mailing list.
>
> Regarding my "bitbake nano" failure, that was a symptom of a sysroot issue. 
> An external cross compiler has some default sysroot where it looks for 
> libraries. By default it looks like OE passes nothing to change this. As a 
> result do_configure() didn't look for libraries in staging dir, decided 
> that ncurses didn't exist, and the build failed. One solution is to add:
>
> TOOLCHAIN_OPTIONS = " --sysroot=${STAGING_DIR_TARGET}"

That is the default now in conf/bitbake.conf:

http://cgit.openembedded.org/cgit.cgi/openembedded/commit/?h=org.openembedded.dev&id=ebd905685a339814c36bf658a8e58bf8f457f14e

> to your build/conf/local.conf and make sure your compiler's default sysroot 
> (libc, etc) gets copied into the staging dir. That way you can call *-gcc 
> from somewhere in your path but it'll look for everything under OE's 
> staging directory.

-- 
Denys